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The Deep Middle


Gardening & writing in the prairie echo

Native Plants to Avoid in a Small Space

1/26/2020

16 Comments

 
It's easy to get excited about a new plant when you're gardening for wildlife in your local ecoregion, and that's especially so when the plant is small or just one or three of a kind. But often plants perform differently in home landscapes compared to the wild where there's more competition; even so, some plants just like to be the boss of others, especially when there's open space filled with wood mulch.

There are a few general habitat and design rules for small spaces that are pretty much universal (but can absolutely be broken in the right circumstances):
  • Choose shorter plants so they both won't flop or visually overwhelm the space
  • Avoid aggressive runners and self sowers
  • Keep the plant palette lean because too much can easily become unmanageable
  • Limit trees and shrubs to short or narrow species, and use only a very few or none
  • Keep a consistent average plant height with only a few taller species

Following are some popular native forbs and grasses whose use might be reconsidered if your garden bed is a few hundred square feet, along with some alternatives. Keep in mind that these plants are commonly native east of the continental divide, but can otherwise serve as proxies or examples for other areas.
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Indian grass in early autumn
Indian Grass (Sorghastrum nutans)
The foliage is lovely in early summer, as are the autumn seed heads and fall leaf color, but it will self sow heartedly and flop in autumn. A good alternative is a shorter bunchgrass like sideoats grama (Bouteloua curtipendula). Both grasses are clumpers that cover the ground plain, which is great for green mulch aficionados.

Common Milkweed  (Asclepias syriaca)

Monarchs lay a lot of eggs on this host plant, but it will get tall and it will most certainly spread via underground runners until you have a milkweed stand and not much else.  Try purple milkweed (Asclepias purpurascens), Sullivant's milkweed (Asclepais sullivantii) or butterflyweed (Asclepias tuberosa) depending on if it's a part sun (A. purp), full sun and moist (A. sull) or full sun and dry (A. tub) site in your landscape.

Blue Mistflower (Conoclinium coelestinum)
Tons of insects come for the masses and masses of late summer blooms, and the fall color is a nice yellow. In ideal soil -- moist and loamy -- it will colonize fully. With drier conditions and clay soil, alongside other plant competition, it will mass and drift more modestly. I don't have an alternative, but can say that with plant density and root competition it's worth a try to contain.

Maximilian Sunflower  (Helianthus maximiliani)

It'll get tall but more importantly it'll run. In its native tallgrass that's a good thing because it's a very beneficial plant for insects and bugs. A Coreopsis might be a good alternative.

New England Aster (Symphyotrichum novae-angliae)
It's going to get leggy and then it's going to get too tall and flop in almost every garden.  The former is solved with dense underplanting, but you can't do much for the rest unless all your plants are tall to buttress one another. Maybe consider aromatic aster (Symphyotrichum oblongifolium) or smooth aster (Symphyotrichum laeve); the former prefers it drier while the latter is more adaptable.

Canada Goldenrod (Solidago canadensis)
I think it was Sting who sang about fields of goldenrod. Maybe not. I've never had to plant canadian goldenrod because it blows in, and once it gets going it runs all over the place. Both showy goldenrod (Solidago speciosa) and zigzag goldenrod (Solidago flexicaulis) clump fairly well in tight-knit plant communities, but they will spread moderately if in beds filled with mulch. Zigzag is considered a shade plant, but I've found success in sunnier spots where it spreads less, even though I would not call it aggressive even in ideal conditions or moist shade.

Gray-Headed Coneflower (Ratibida pinnata)

This one is a common issue. Evolved to thrive in the tallgrass prairie where it has other tall plants to lean on, as a specimen it grows quite tall then bows down in a most penitent fashion. Better to stick with pale purple coneflower (Echinacea pallida) or even Mexican hat (Ratidiba columnifera), but the latter acts more like an biennial unless it's allowed to self sow as it prefers.

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Gray-headed / gray-head / grayhead coneflower
16 Comments

The Easiest Native Plants to Grow (Not Really)

1/3/2020

6 Comments

 
I’m often asked what are the easiest native plants to try. That question might be asked by folks new to gardening, those transitioning to native plant communities, or those with lots of experience looking to make things simpler.
 
There is no clear answer. The easiest native plants are those fitted to your site conditions and the other plants growing alongside them. And sometimes “easy” means you don’t have to water, the plant doesn’t spread too much, or the plants doesn’t get too tall and flop over messily. These three scenarios don’t have blanket answers, but I could say that, in order: 1) match the plant to soil and drainage; 2) match the plant to site conditions and other plants; 3) maybe the plant is in the wrong spot, tended too much, or isn’t in the best plant community.
 
We’ve first got to take our cues from wild plant communities -- observing how specific species perform together in specific scenarios. But we also have to know that when we try our best to match these realities in suburbia -- at home or at work and school -- the outcome will always be a bit different. For example, the soil life and profile is changed and the environmental stressers are somewhat novel. But that doesn’t mean we can’t translate well and help support the same fauna (like insects) that use both wild native plant communities and their urban analogues.

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E. pallida and B. minor surrounded by grasses.
Here’s a plant community that tends to work more often than not on sunny, dry clay sites around homes (50% sun is good, too, especially on a western exposure):
 
  • Baptisia minor
  • Heuchera richardsonii
  • Echinacea pallida
  • Callirhoe involucrata
  • Liatris aspera
  • Symphyotrichum oblongifolium
  • Schizachyrium scoparium
  • Bouteloua curtipendula
 
There are many reasons these plants work well together, from human aesthetic concerns to filling ecological niches and layers. The grasses, mallow, and alumroot all work as a ground cover or green mulch. The forbs serve as seasonal color and resources for pollinators of various species. There’s different texture, structure, and height for humans to enjoy. Many of the plants look good in winter. Some plants have fibrous root zones, some are tap rooted, and others have corms -- this mixing ensures plants don’t always compete at the same levels for nutrients, but also helps stem erosion and rainfall absorption as the soil layers are amended. Well, I could REALLY go on about all of this, but that’s for another time. If you crave more specifics please ask away.

Ultimately, the above plants are fairly low worry, adaptable, and thrive with loving neglect. You still have to "garden" of course -- weeding, thinning, replacing, cutting back in spring, etc -- but the above short list does tend to be fairly reliable.

6 Comments

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    Benjamin Vogt's thoughts on prairie gardening in Nebraska. With a healthy dose of landscape ethics, ecophilosophy, climate change,  and social justice.

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prairie inspired  design

Lincoln & Omaha, Nebraska

Monarch Gardens is a prairie-inspired design firm. We specialize in lawn to meadow conversions as well as urban shade gardens.

Employing 95% native plants, our designs are climate resilient, adaptable, and provide numerous ecological benefits while artistically reflecting wilder landscapes.
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